Improvement in key-hole guards



E. WILT.

KEMIOLE GUARD.

No.176,210. .Patenned-Apr111e,1s7e.

F1115 FIGB Fmr: Flu

UNITED STATES PATENT Genres.

EMIL WILT, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF HIS RIGHT T() ANDREW J. LOECHER, OF SAME PLACE. I

IMPRVEMENT IN KEY-HOLE GUARDS.

Specication forming part of Letters Patent No. 176,2 l 0, dated April 18, 1876 application filed August 4, 1875. Y

To all 'whom yit may concern:

Be it known that I, EMIL WILT, of the city and county of Philadelphia, in the State of Pennsylvania, have invented an Improvement in Padlocks, of which the following is a specilication:

My invention consists of certain improvements on what is called the Scandinavian or Yale padlock, and it relates to the following particulars:

The cap plate is provided with a rim for inelosing the spring which confines the tumblers and washers together. Outside of the spring -is placed the tbllower-washer, having lugs, which are held in slots ofV the rim ot' the plate, and between theiollower-washer and the cap` plate is placed a revolving disk, which constitutes a cover for the key-hole in the cap-plate. Said disk is provided with an opening for the passage of the key. at its sides to receive a projection on the -end of. the bow of the key, for turning the cover partly around to obstruct the passage ot' the key, and for reversing the cover for an unobstructed passage of the same, as hereinafter described.

In the accompanying drawings, Figure 1 is a longitudinal section of my improved padlock. Fig. 2 is a cross-section of the saine at the line x :r ot' Fig. 1. Fig. 3 is a face view of the cap-plate I. Fig. 4 is an edge view of the same. Figs. 5 and v6 are anl edge and face views, respectively, of the key-hole cover H. Figs. 7 and 8 are like views of the washer D5. Figs. 9, 10, 11, 12, and 13 are face views ot' the tumblers G, U1, G2, C3, and O4. Figs. 14, 15, and 16 are like views ot' the stationary washers D, D2, and D4. Figs. 17 and 18 arean end and Y side views of the key J.

Like letters of reference in all the figures indicate the same parts.

A is the case, and B the shackle. U, G1, G2, G3, and C4 are the tumblers, the face views ot which are seen in detail in Figs. 9, 10, 11, 12,

The opening has recessesv aspring for holding the tuinblers and station,- ary washers securely together. D5 is a follower-washer outside ofthe spring E. H is a revolving disk for covering the key-hole in cap-plate I J is thekey, (shownin detail in Figs. 17 and 18.) It has bits on only one side, to simplify its construction and prevent the lock being opened with a key having hitsas usual, on both sides. The tumblers G, C3, and C4 have plain key-holes, in which the edges c are bearings for the bits b, b3, and b4 of the key, and hence said key-holes are at right angles to a line through the middle of the recesses d cl, through which the shackle passes when unlocked. The tumbler G1(shown in detail in Fig. 10) has a true notch, c1, for the bit b1, which notch is at right angles to the shacklerecesses d. It has also a false notch, e, which is to deceivea burglar in aligning the tumblers, or to prevent the proper adjustment of the tulnblersby a key with a bit a trifle longer than is required to tit in the true notch al. The tumbler G2 has a true notch, c2, at right angles to the line of shackle-recesses d. The key-hole in tumbler G2 is turned farther around than in the tumbler G1. deceptive notch, e'.

In the manufacture of. the locks I make the true notch in the tumblers different in each lock and in diierent tumblers, thereby making a large number of combinations, and render it impossible for any of the locks to he opened by any key but its own.

The stationary washer D2 has a stop-notch, f, at right angles to the key-hole, to arrest the motion of the key as the bit presses upon it. The opening is just large enough for the bit to turn in it,'so that it' a burglar should have a key with a longer bit, it would not open it.

The stationary washer D4 has a stop-notch, f',

for the same purpose as the notch f.

The carp plate I has a rim, g, in which is placed the spring E, i'orconlining all the stationary washers and tulnblers together. It has slots It` h, for holdingthelugs z' of the follower-washer D5. Between the washer D5 and the plate I is the revolving disk H, which has a keyhole in theform of a cross for the passage ot' the key. It is shown in detail in Fifr. 6. This disk is for covering the keyhole when It also has a false orl the hasp is locked. This sele'cted byy the useof projection j on the bow of'the key. The;A

seid projection is placed in the cross recesses l Z of' the key-hole, and lthe key turned partly around to make the disk cover the key-hole of the cap-plate. The object of providing said and thus prevent the losing of its power.

For opening the lock the key is placed With its first bit resting on lthe disk or cover Hand pressed forward, the spring E yielding to the pressure until there is space enough between the cap-plate and the disk for the passageof" -the case-Arend the seriesof htsare. inline witlrtheir respectivetumblers.. Then hy turning the key one fourth around, the tuinhlers are turned around far enough to bring the rel-cesses d d in line with the shackle forits Withdrawal. i

plate with the rim g for encircling' thespring is to prevent its sprcadingwhen pressed-down,`

I claim as my invention- 1. The cap-plate I, havingf a rim, g, provided with slots h h, in combination with the revolving key-hole cover H and Washer D5,

having guideflugs- 'i t', substantially as set A forth.

2. The oep-'plate I, having the rim g, in combi'nzttion with the revolving keyhole-.cover H, 11a-ving e key1hole,with side openings l, for

the insertion of the projection of the key, whereby the said cover may be revolved, substantially as and for the purpose setforth.,

,c EMIL. VI-L'l.. Witnesses:`

THOMAS J. BEWLEY, ,STEPHEN UsTIeK. 

